Accurate Collimation : Ensures precise alignment of optics, ideal for high power observing where clarity and sharpness are critical. Stable Material : Crafted from durable aluminum alloy, resistant to rust and wear, ensuring long-lasting use under varied conditions. Easy To Use : Designed with an intuitive setup, simply insert into 1.25 inch focusers for quick collimation without complicated steps. Red Crosshair Feature : Enhances visibility and precision during adjustment, making collimation faster and more effective. Better Image Quality : Optimizes telescope performance by aligning mirrors accurately, resulting in clearer and sharper views. This professional-grade Collimating Eyepiece is engineered for astronomy enthusiasts seeking optimal optical performance. Its robust aluminum alloy body ensures durability while resisting rust and wear over time. The internal light eliminating thread minimizes glare, enhancing contrast during observation. Featuring a distinct red crosshair, this tool simplifies the collimation process, allowing precise centering of your telescope's optics. Whether you're using a Newtonian reflector or a Schmidt-Cassegrain telescope, this eyepiece enhances image clarity and detail—making it essential for serious stargazers who demand excellence. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin